<div class="doc-item" id="doc-2018"><h2 class="doc-item-name">update-in<span class="namespace">(clojure.core)</span></h2><ul class="var-arglists"><li>(<span class="var-name">update-in</span> m [k &amp; ks] f &amp; args)</li></ul><div class="var-docstring"><p>'Updates' a value in a nested associative structure, where ks is a
  sequence of keys and f is a function that will take the old value
  and any supplied args and return the new value, and returns a new
  nested structure.  If any levels do not exist, hash-maps will be
  created.</p></div><div class="var-source"><pre>; clojure/core.clj:3763
(defn update-in
  ([m [k &amp; ks] f &amp; args]
   (if ks
     (assoc m k (apply update-in (get m k) ks f args))
     (assoc m k (apply f (get m k) args)))))</pre></div><div class="license"><p>Copyright (c) Rich Hickey. All rights reserved.</p><p>The use and distribution terms for this software are covered by the <a href="http://opensource.org/licenses/eclipse-1.0.php">Eclipse Public License 1.0</a>, which can be found in the file
          epl-v10.html at the root of this distribution. By using this software
          in any fashion, you are agreeing to be bound by the terms of this 
          license. You must not remove this notice, or any other, from this 
          software.</p></div></div>